<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <input type="text">
        <input type="text" v-focus>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        Vue.directive('focus', {
            inserted: function (el) {
                //el表示指令所绑定的元素
                el.focus();
            }
        })
        var vm = new Vue({
            el: '#app',
            data: {

            },
            methods: {
                handle: function () {

                }
            },
        })
    </script>
</body>

</html>